Valve-spring retainer



C. W. FINNEY. VALVE SPRING RETAINER. APPLICATION FILED NOV. 13. 19m.

11 327 539 Patented Jan. 6,1920.

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VALVE-SPRING RETAINER.

Specification of Letters Patent.

Patented J an. 6, 1920.

Application filed Ilovember 13, 1918. Serial No. 262,387.

To all L0]L Q77b it may concern. 7 V V Be it known that I, Queries lV. FINNEY, a citizen of the United States, residing at Spokane, in the county of Spokane and State of Washington, have invented certain new and useful Improvements in Valve- Spring Retainers, of which the following is a specification.

The present invention relates to an improved valve spring retainer, adapted especially for use in connection with valves of the puppet type adapted for internal combustion engines or motors.

The primary object of the invention is the provision of means for retaining and fixing the valve positively to its seat and against displacement, under all conditions. In many of the motors now in actual use, when running at high speed, it is difficult to hold the disk in proper position because of the tendency of the spring to fail to return the disk into proper position. In the present invention, devices are employed which insure a positive pressure of the spring on the disk at all times and in all positions, even though the spring should fail to return at the proper time. In addition the device contem plates the utilization of means whereby the spring may readily be removed and the disk cup released, as will. be pointed out in the following specification and claims.

In the accompanying drawings one complete example of the physical embodiment of the invention is illustrated, according to the best mode so far devised for the practical application of the principles of the invention.

Figure 1 shows a portion of the valve device, the disk cup being shown in section, disclosing the lever arms and the spring bearing on them.

Fig. 2 is an edge view, as seen from the left or right in Fig. 1, showing the relation of the disk, retaining levers and valve stem.

Fig. 3 is a detail view showing the position of parts when releasing the disk cup, the spring being contracted by the lever arms. I

Fig. 4 is a plan view of the disk andlever arms, the stem being shown in section.

Fig. 5 is a perspective view of one of the lever arms, and Fig. 6 is a complete assembly.

In the preferred embodiment of the invention as shown in the drawings I have utilized theiusualor standard form of disk cup 1 which has the usual annular, groove 2 on itsupper surface and complementary annular rib 2 on its under surface. At its center the disk is provided with an opening 3, from which radiate the diametrically arranged horizontal grooves i and l which extend to the edge of the disk, and conform to the configuration thereof. The coiled spring 5 rests in the annular groove of the disk, and surrounds the stem 6 which is centered in the disk and passes through the opening 3 thereof. At its lower end, he neath the disk, the stem is provided with an annular, exterior groove 7 having sharp shoulders or edges, and through this groove, the two lever arms 8 and 9 are connected with the stem. Each of the arms has an offset shoe 10 provided with a semi-circular rounded face 11, which it will be apparent conforms to the groove 7 of the stem. In normal position these two arms 8 and 9 lie in the diametrical grooves l and 4: of the disk with the shoes passed through the opening 3 of the disk and having their curved faces or edges 11 engaged in the groove. The arms lie flush with the upper face of the disk, and near their ends each arm has a transverse groove or depression as 8 or 9. forming a continuation with the annular groove 2 of the disk, and it will be apparent that the spring when bearing against the disk, also bears against the arms 8 and 9, through their engagement with the depressed portion of each arm. Thus it will readily be evident that as the spring is compressed these arms will be caused to act as levers with the shoes engaged in the groove 7 as fulcrums, and the disk is caused to make a positive engagement and prevented from wabbling.

When it is desired to release the disk, to remove the spring or puppet valve, a tool bent like a pair or pincers with wedge points may be inserted between the washer and the ends of the arms to raise the arms to position of Fig. 3 and the stem of the valve is thus disengaged from the shoes 10 of the arms, and is free to be released or withdrawn.

What I claim is 1. The combination with the disk having a central opening and the grooved stem passing therethrough, of a pair of diametrically arranged arms having shoes passed through the opening and engaging the grooved stem, and a spring bearing on the disk and arms.

2. The combination with the disk having a central opening and an annular groove on its upper face near its edge, of a pair of diametrically arranged arms having grooves corresponding to the annular groove, a spring bearing on the grooved disk and grooved arms, and a grooved stem, said arms having connection With said grooved stem.

3. The combination with the disk having a central opening and an annular groove on its upper face near its edge and the stem passing through said opening and provided With a groove beneath the disk, said disk having a pair of diametrically arranged grooves, of a pair of arms lying in said grooves and having shoes passed through the opening in the disk and engaging the grooved stem, said arms having grooves corresponding with the annular groove in the disk, and a spring bearing against said grooved disk and arms.

In testimony whereof I aflix my signature.

CURTISS W. FINNEY. 

